gpg4o is an Add-In for Microsoft Outlook 2010/2013/2016® which is enabling you to encrypt as well as decrypt, sign and verify messages and their attachments. gpg4o uses GnuPG, a free encryption software, following the OpenPGP standard.
gpg4o uses an asymmetric encryption procedure and follows the OpenPGP-standard. With this system key pairs are used consisting of a private and of a public key. The private key is to be kept secret, the public key is passed on to one’s contacts. As soon as you receive the public key of a communication partner you may use it to encrypt an email message to the corresponding recipient. The encrypted message can then only be decrypted with the recipient’s private key. In the user manual you will learn how to use gpg4o for sending and receiving encrypted and / or signed files.
gpg4o is designed for Microsoft Outlook 2010® , Microsoft Outlook 2013® and Microsoft Outlook 2016®. Since Microsoft completely changed the interface for plugins, gpg4o will not work with older versions of Microsoft Outlook. In addtion you will need an installed version of GnuPG v1.4.21 or higher. If you have not done so yet, the installation process will guide you through the installation of GnuPG. You will find the necessary installation files in the download area. The steps necessary for installation have been described in the manual. As operating system Windows Vista ®, Windows 7 ® (32/64 Bit), Windows 8 ® (32/64 Bit) or Windows 10 ® (32/64 Bit)may be utilized. The usage of up to date service packs is highly recommended. Detailed information can be found on the requirements page.
Don’t sweat it. All mails you encrypted with the trial version may still be decrypted with gpg4o (if you do not uninstall gpg4o. If you need more time to test gpg4o please contact us under firstname.lastname@example.org . We will extend your trial period. As soon as you import a valid license after the trial period, gpg4o can be used to its full extend.
If you cannot import your license or get the error message “No Licensefile”, please double check whether GnuPG has been installed correctly and the path to gpg.exe or gpg2.exe is correct. More information about settings can be found in the manual
You may have deleted the account with the mail address, gpg4o is licensed for. To reactivate gpg4o, please visit the license management portal. Change the licensed mail address there and import the new license into gpg4o. Everything will be fine after that.
You need to bind the license to a mail address you use with the Outlook where gpg4o has been installed. To change the license into on a working one, please visit the license management portal. Change the licensed mailaddress there and import the new license into gpg4o. Everything will be fine after that. You may of course use your gpg4o license with all configured mailaddresses of your Outlook-Installation
Your license itself is perpetual and will not expire. The license includes one year of product maintenance, support and all updates. You may buy additional years of maintenance to extend your support into the future. gpg4o works with a single-user license on two computers and multiple email accounts, as long as the licensed email address is present in Outlook on both systems. The period of your maintenance starts with the first download of the license. You do not have to reinstall gpg4o when you buy a license. If you want to use gpg4o with multiple profiles within the same Outlook installation, please contact us.
If maintenance has expired, you can still use gpg4o. This means you can still encrypt/sign your outgoing emails and read encrypted/signed emails. But you cannot install new updates and / or request support from us.
With a license renewal you can install all new updates within the maintenance period for gpg4o as well as request support for it. The development team is developing the program constantly and is integrating suggestions of customers in new versions. After buying a maintenance renewal the license has to be imported into gpg4o again.
During an update your GnuPG keyring and all your gpg4o settings are left untouched and will be available with the new version.
Install gpg4o as local administrator.
Yes, keys may be imported or exported via drag ‘n drop.
Yes, you can, gpg4o supports encrypted emails in the HTML-format.
If you send an email and if you activate the options for “encrypt” and/or “sign” these settings will be applicable for the text of the email as well as for its attachments. Only the subject and the recipient list remain unencrypted. It is also possible to encrypt only attachments.
First of all, make a backup with gpg4o. It will contain everything you need from keyrings to settings. Install gpg4o on the new computer and import this backup. That´s all! Attention: Only backup to your own physical drives. The backup of gpg4o contains personal data which is not meant to be spread even if encrypted.
Well this should not be a necessary FAQ point nowadays but our support says it is! The reason: If you do not have access to your private key anymore, all encrypted data which you still may have is protected from all access. So we highly recommend a backup of gpg4o (makes it easy to regain functionality on a new computer and we recommend as well to save the backup on a different physical drive. Never upload this backup to the cloud since it contains valuable personal data. Companies should think about a backup strategy for all keyrings and gpg4o installations.
GnuPG is supported up to the latest version. Some things (like passphrase cacheing) work a little bit different compared to GnuPG 1.4.x
gpg4o uses the PGP/Inline-procedure in order to send encrypted emails. The PGP/MIME-format is supported in the read-only mode.
Do you have questions about pricing or licensing which are not yet answered in our shop (especially for large organizations, NGOs, schools, students etc., please use the contact form. If you have installed gpg4o already, you can just use the Button “Contact sales…” in “gpg4o-help”.
In case of problems with or questions during installation or utilization of gpg4o please write an email to our support. If an error has occurred please remember to enclose the automatically generated log-file. You help us if you describe the errors you observe as precisely as possible, indicating which steps you have taken before the error occurred.
In order to permit our development department the efficient elimination of possibly occurring errors, status reports are written by gpg4o into so-called log-files. These status reports contain neither personal information or passwords nor contents of emails. Before sending the email with the log-files you can see the transmitted information by unpacking the attached .zip-file. All files contained therein consist of plain text.
The option “hide filename” is enabled per default in gpg4o and increases the level of trust of your emails by hiding the name of the file. You can change this option in the gpg4o settings, if the receiver of this file can’t decrypt this file. In the gpg4o “Settings”/”Send/Receive settings”/”Send-Attachments options”, you can activate the option “keep filename”. By doing this, the compatibility with other OpenPGP programs is increased.